dual spacing meaning in English

双轮中心距
双胎间距

Lipschitz - dual operators and dual spaces
对偶算子及对偶空间
Dual spacing of vechicle wheels
汽车车轮双轮中心距
Tyres for light trucks , buses and their trailers ; dual spacings and clearance
轻型卡车客车及其挂车用轮胎.双间距和间隙
Half dual spacing
半双轮中心距
Tyres for trucks , buses and their trailers ; dual spacings and clearance for tyres on 15 tapered rims
卡车客车及其挂车轮胎. 15度肩轮辋轮胎的双间距和间

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